Quartz sensor and sensing device

A quartz sensor having a capture layer for capturing a sensing target in sample solution formed on a plate surface of an AT-cut quartz plate thereof and sensing the sensing target based on a change in a natural frequency of the quartz plate caused when the sensing target is captured by the capture layer, said quartz sensor comprising electrodes for vibrating the quartz plate provided on mutually opposite end faces of the quartz plate, wherein a metal layer insulated from said electrodes is formed on the plate surface of the quartz plate, and the capture layer is formed on the metal layer.

A quartz sensor having a capture layer for capturing a sensing target in sample solution formed on a plate surface of an AT-cut quartz plate thereof and sensing the sensing target based on a change in a natural frequency of the quartz plate caused when the sensing target is captured by the capture layer, said quartz sensor comprising electrodes for vibrating the quartz plate provided on mutually opposite end faces of the quartz plate, wherein when said electrodes provided on the end faces of the quartz plate are set as first electrodes, there are mutually opposite second electrodes each provided on a part of each of both plate surfaces of the quartz plate, and said first electrodes and the second electrodes are electrically connected to one another.

A quartz sensor, comprising:

• an AT-cut quartz plate having a first face and a parallel, opposing second face separated by a plate height, the plate having a length spanning an “X” dimension, a width spanning an orthogonal “Z” dimension, said plate height spanning an orthogonal “Y” dimension, said length being greater than said width, said first face spanning said “X” dimension and “Z” dimension and an entirety of said first face being flat, said second face spanning said “X” dimension and “Z” dimension and an entirety of said second face being flat;
• a capture layer capturing a sensing target in sample solution formed on said first face and sensing a sensing target at the capture layer based on a change in a natural frequency of the quartz plate caused when the sensing target is captured by the capture layer;
• electrodes provided at opposing plate edges that are at mutually opposite positions along said “Z” dimension of the quartz plate, and which are for causing a parallel electric field excitation in the quartz plate.